Be an investigatorUse the Scientific Method to create a hypothesis and an experiment to test that hypothesis. For example, posing the question “Do plants grow better when fertilizer is used?” and then experimenting to come up with an answer. It would be good to put your findings in a notebook and have that with the exhbiit.

Here's a great video of an erosion experiment:

​Here's another project applying the Scientific Method to determine the effect of bleach on food coloring: